KR20050102600A - Plasma odor and germ remover - Google Patents

Abstract

An object of the present invention is to provide a plasma deodorizing sterilizer which is capable of converting polluted air containing harmful substances such as various VOCs (volatile organic compounds), odors and bacteria into real-time fresh air harmless to the human body.

Plasma deodorizing sterilizer according to the present invention for achieving the above object, ozone generating means for generating ozone by the power supplied from the outside; A mixer for mixing ozone generated from the ozone generating means and polluted air; A sliding arc plasma generator for generating plasma ions and radicals having strong oxidizing power by power supplied from the outside; A reactor including a photocatalyst and a water supply device and surrounding the arc plasma generator; A composite activated carbon catalyst layer for treating a small amount of residual ozone, residual pollutant gas, residual nitride oxide, and the like; A blower for supplying the processing gas at a constant pressure and flow rate; A tubular mixer having a long cross-sectional area and a long length for extending the gas residence time and simultaneously reducing the sound generated by arc plasma generation; An air ion generator for generating stable anions and cations at the same time; Characterized in that it comprises a fan installed at the gas outlet.

Description

Plasma odor and germ remover

The present invention relates to a VOCs (Volatile Organic Compounds), odor and bacteria remover, and to a plasma deodorizing sterilizer which can generate fresh air harmless to human body by oxidatively decomposing contaminated air containing various VOCs, odors and bacteria in real time. It is about.

The prior art most relevant to the present invention is shown in Figure 1 (US Pat. No. 6,451,252). This technology is a process to remove various odors generated in the agriculture, animal husbandry and food industries. The core of the technology is that odorous components (amines) with large molecules are treated with ozone and small molecular gases (such as ammonia, methane, hydrogen disulfide, etc.) that are difficult to treat with ozone are treated with pulsed arc plasma or Dielectric barrier discharge plasma (DBDP). It is. However, this technique has the disadvantage of using residual ozone treatment and using low energy efficiency and expensive complex plasma generator. In addition, this technique does not mention a technique for generating OH radicals having strong oxidation power by photocatalysts.

In addition to the conventional conventional techniques related to the present invention, passive activated carbon adsorption method, which is low in initial investment cost, is most commonly used. However, since consumable activated carbon is periodically required, not only the operation cost is high but also the removal efficiency drops rapidly when the odor concentration is low. You have a problem. In addition, there is a problem that the problem of the treatment of activated carbon adsorbed odor and the cause of the untreated odor can not be eliminated at the source.

Second is the multi-stage chemical cleaning method. This method has a very good removal efficiency because it is chemically oxidized and reduced by reacting with an acid or alkali solution, but it has problems such as high initial equipment cost, relatively large installation space, and wastewater treatment.

Third is a low temperature (200-400 degrees) catalyst incineration method. This method has a very good removal efficiency, but because of the use of expensive catalysts, there are problems such as expensive catalyst replacement cost, catalyst poisoning, and high energy operation cost due to high temperature operation.

Fourth is a high temperature incineration method. This method is widely used in large factories, but it is most certainly deodorized and sterilized but has problems such as high initial investment cost, high energy operation cost and excessive space requirements.

Fifth, there are various plasma methods (corona discharge, DBD, glow discharge), but they have expensive power and plasma generator cost, frequent electrode replacement, and low efficiency energy.

Lastly, photocatalytic / ultraviolet / ozone methods have recently emerged as new technologies, but many technical and economic disadvantages such as frequent ultraviolet lamp cleaning, expensive lamp costs, relatively low throughput, and residual ozone treatment have been pointed out. .

Therefore, a preferable pollutant gas remover should be a system capable of inexpensive plasma generation equipment, easy operation and operation, and at the same time, maximizing pollutant gas treatment capacity and removal rate without residual ozone problem.

The present invention was developed in order to solve the conventional problems as described above and to meet the demands of the industry to oxidatively decompose air containing various pollutants (VOCs, odors) and bacteria in real time to produce fresh air that is harmless to the human body. It aims to provide a plasma deodorizing sterilizer for removing VOCs, odors and bacteria.

Plasma deodorizing sterilizer according to the present invention for achieving the above object, ozone generating means for generating ozone by the power supplied from the outside; A mixer for mixing ozone generated from the ozone generating means and polluted air; A sliding arc plasma generator for generating various active atoms, molecules, electrons, ions, and radicals by a power source supplied from the outside; A reactor comprising a photocatalyst and a moisture humidifier for generating OH radicals and plasma oxide ions having a stronger oxidation power than ozone by ultraviolet rays generated in the arc plasma; A composite activated carbon catalyst layer for treating a small amount of residual ozone, residual pollutant gas, residual nitride oxide, and the like; A blower for maintaining a process gas flow rate necessary for stabilizing arc plasma; A long-sized pipe-type mixer having a long cross-sectional area for extending the residence time and reducing the sound generated by arc plasma generation; It consists of an air ion generator which generates stable anions and positive ions at the same time and a fan installed at the exhaust gas outlet. Hereinafter, a preferred embodiment of the plasma deodorizer sterilizer according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a process diagram of a plasma deodorizing sterilizer of the prior art. The contaminated gas is administered to the ozone and ozone mixer 14 generated in the ozone generator 12. Significant contaminants are removed by the oxidizing power of ozone (especially high molecular weight contaminants) in the ozone mixer, and unremoved contaminants and residual ozone exit the ozone mixer and enter the low temperature plasma reactor 16. Low-temperature plasma generators use pulsed corona discharge or DBD (Dielectric Barrier Discharge). The oxidative radicals generated in the plasma generator are oxidatively decomposed with the remaining contaminants that have not been removed, thereby increasing the removal rate. However, this technique has the disadvantage of using residual ozone treatment and using low energy efficiency and expensive complex plasma generator. In addition, this technique does not mention a technique for generating OH radicals having strong oxidation power by photocatalysts.

2 is a general process diagram of the plasma deodorizer sterilizer according to the present invention. First, the contaminated gas passes through an ozone / pollutant gas mixture 210 including a porous filter made of a multi-layered noncorrosive material, and then a sliding arc plasma reactor 212, a honeycomb photocatalyst filter 214, and a composite activated carbon catalyst filter. 216, the blower 218, the tubular mixer 219, and the air ion generator 222 are continuously passed and then discharged to the outside of the device through the blower 224 installed at the final gas outlet. If additional moisture is needed, the humidifier 225 may be installed directly in the plasma reactor.

So far, the basic configuration of the plasma deodorizer sterilizer has been described.

Hereinafter, each configuration of the plasma deodorizer sterilizer according to the present invention will be described in more detail with reference to FIGS. 3 and 4.

3, the ozone / pollution gas mixer 201 is composed of a cylindrical or square tubular box 202 made of plastic or stainless steel that can withstand corrosive polluting gases. Inside, three shelves 203 are installed at regular intervals. Each shelf ensures that the pollutant gas / ozone is sufficiently contacted and mixed while separating and filtering excess dust, moisture or oil in the pollutant gas. The shelf material and structure is comprised of plastic, ceramic or stainless steel demisters 204 so that process gas flow rates and pressure losses can be optimized. Another function of the mixer is to reduce the sound generated by the blower and the arc generator.

The ozone generator 220 is an ozone generator by high frequency corona discharge. The device consists of two metal disc ozone generators coated with a thin ceramic, an ac high frequency high voltage power source, an oxygen concentrator (geolite, air compressor, etc.) and a control board (not shown) that controls them. The ozone generated is connected to the mixer top 209 via a Teflon tube 208. In general, an adequate capacity ozone generator is already available or can be easily obtained by a professional manufacturer.

The ozone generation amount used in the present invention is 50 mg-500 g per hour and the power used is AC 2500-9000V, 60-40000 Hz, 5-200mA. Generally, 100-3000mg is suitable for homes, offices and businesses and more than 3000mg for industrial use, but the optimal ozone generator selection is highly dependent on the working environment to be used.

Gas and residual ozone partially treated by ozone while passing through the gas mixer 201 are introduced into the plasma reactor 300 having the arc plasma generator 310.

The arc plasma generator and the surrounding reactor are described in detail in patent 10-2004-0050089, which is already filed by the present inventors, and all of the claims described here also apply redundantly to the present invention. However, the difference between the patent pending 10-2004-0050089 and the present invention is that the former has a relatively low concentration because it does not have a composite catalyst filter and an anion generator and also uses a ceramic ozone generator that uses air as a raw material as the ozone generator. Is using an ozone generator.

The basic configuration of the sliding arc 402, which is the core of the arc plasma generator 310 used in the present invention, is shown in more detail in FIG. When a high voltage, low current is imposed between two or more electrodes 413 whose arc spacing gradually increases (i.e., horn type), a gas 403 having a constant flow rate (1-100 m / s) is passed between the electrodes. This arc 405 is called a sliding arc or a gliding arc as the overcurrent changes at a specific period. Two electrode plates 406 having a thickness of 0.1-6 mm are made of copper or stainless steel. The nearest electrode distance is 0.2mm or more, the farthest electrode distance is 50mm or less and the electrode length is 50mm or more, but in the present invention, the closest distance is 0.5-4 mm, the farthest electrode distance is 20-30mm and the electrode length. Mainly use 70-200mm. The bottom end 407 of the two electrodes is joined by a copper or copper alloy rod 409 and connected to an external arc power terminal. AC power is used.

The two electrodes are placed in a cylindrical tubing 431 made of insulating material (ceramic or BMC, bulk molding compounds) and the spacing between the two electrodes is controlled by an insulating connection fitting 411 of plastic or ceramic. The electrode plate other than the arc contact point 413 and the inside of the BMC cylinder tube are coated with a TiO 2 photocatalyst solution 420. The arc voltage and current vary depending on the arc temperature, ozone generation amount and process gas capacity, but the power supply used in the present invention is the arc voltage 3000-15000 volts when the arc temperature is limited to less than 1000 ° C and the processing capacity is less than 30 m3 / min. Arc current 5-800mA, frequency 60-30000Hz is used. The temperature of the process exhaust gas by the arc generation temperature depends on the arc power used and the amount of process gas air flow, but the arc power used in the present invention is adjusted so as not to rise more than 10 degrees C above the process gas input temperature.

The arc plasma reactor 300 is made of a metal that is coated with a plastic or an electrical insulator that withstands a temperature of 100 degrees C or more, and is composed of an arc plasma generating portion 320 and a portion 330 having a honeycomb photocatalyst layer. . The former has four (one phase 220 V, two arc generators) holes for high voltage wire connection and one hole for the observation window to view arc generation and the inside of the tube is coated with TiO ₂ photocatalyst. have. The latter is an example of a ceramic honeycomb photocatalyst filter 350 in which a TiO ₂ photocatalyst is coated on a honeycomb alumina tin (200 pores per inch) of 150x150x50mm dimension.

The size and pore distribution of the photocatalyst filter 350 may vary depending on the operating pressure inside the reactor and the operating conditions of the blower.

Oxidized gas, untreated polluted gas, residual ozone and NOx through photocatalyst filter 350 operate at relatively low temperature (generally below 70 ° C) and at the same time increase the contact time between radical and polluted gas Pass the composite activated carbon catalyst filter 500. As a catalyst raw material, activated carbon mainly containing 10-50% of manganese dioxide is widely used. In addition, a zeolite or various well-known silica-alumina catalysts and oxide catalysts containing low-cost metals are also used. As the catalyst support, ceramics, fibers, paper, and metal materials may be used.

The purified gas passed through the composite activated carbon catalyst filter 500 is transported by the blower 600 and passes through the tubular mixer 700 having a long cross-sectional area and a long length at low speed, and the long-life radicals still remaining (eg, : Ozone, NO2) is added to remove residual pollutants.

Since the selection of the blower 600 depends not only on the processing gas capacity but also on the arc plasma maximum voltage, it is very important to select a blower having an appropriate wind pressure.

Low-noise ventilator for the final deodorizing, sterilized and purified gas is quickly circulated to the outside through a bi-polar ionizer (800) for generating a certain amount of anions and cations installed in the rear end of the pipe-type mixer 700 Out through 900. The main role of the air ion generator is to control the amount of anions and cations in the room, while at the same time removing untreated bacteria and trace residual odors. The capacity of the fan is determined according to the capacity of the plasma generator. The ozone concentration of the exhaust fan exhaust gas outlet is always 0.05 ppm or less regardless of the ozone generator generation amount (50-500000 mg / hr), which is the ozone generation amount, the arc plasma generator, the photocatalyst coating unit 345, the photocatalyst filter 350, It is made by adjusting the gas flow rate of the composite activated carbon catalyst filter 500 and the blower 600.

Referring to the operation of the plasma deodorizing sterilizer according to the present invention having the above configuration as follows.

The air containing the polluted gas transported by the blower 600 passes through the polluted gas / ozone mixer 201 to purify a part of the polluted gas by an oxidative decomposition reaction of ozone. The reason is that ozone requires a long contact time (10 minutes to 16 hours) to directly oxidize with pollutants at room temperature, whereas the gas residence time in the pollutant / ozone mixer used in the present invention is generally less than 1 second. Because it is. Therefore, the main function of the mixer is to mix ozone and pollutant gas well. The residual pollutant gas which is not removed by the ozone and the residual ozone which does not participate in the reaction are introduced into the arc plasma generator 310. The high velocity pollutant gas / ozone passing directly through the arc plasma generating region formed between the two electrode portions 406 is combusted at a temperature of about 900-1000 degrees C. Ozone and NOx (nitride oxides) generated in the arc itself can be adjusted to less than 0.05ppm for ozone and 3ppm for NOx by adjusting the arc current, voltage and frequency. The low concentration of ozone generated in the arc is decomposed by the heat and ultraviolet light emitted from the arc plasma itself and converted into active oxygen atoms, which react with water in the process gas to generate a powerful oxide, OH radical. At the same time, the electron and quantum energy generated when ultraviolet rays of a specific waveform emitted from the arc are irradiated to the photocatalyst (TiO2) material and the honeycomb photocatalyst filter 350 coated on the inner wall of the electrode and the reactor are generated by Reacts to produce OH radicals with strong oxidative power. On the other hand, the residual ozone from the mixer 201 is converted to radicals containing free radicals or oxygen by plasma heat, and these free radicals or radicals are converted to OH radicals by reacting with moisture in the contaminated gas. At this time, if moisture is added to the moisture humidifier 370, the amount of OH is greatly increased. Since the lifetime of OH radicals in air is less than about 1 second, but the oxidizing power is more than 10 times higher than ozone, odors, bacteria, molds and various contaminants contained in incoming residual pollutants are easily oxidized by OH radicals, making them harmless _It is converted to ₂ and H ₂ O, causing strong deodorization, sterilization and sterilization effect.

The principle of OH radical generation is that when ozone absorbs ultraviolet rays with a certain energy, it converts into oxygen molecules and generates atomic oxygen. When the atomic oxygen and water molecules react, OH radicals are produced. A typical photocatalytic chemical equation is as follows.

^{_{TiO 2 + UV energy = h +}} + e - (1)

h ⁺ + H ₂ O = OH ^* + H ⁺ (2)

^{h + + OH - = OH *} (3)

_{^{O 3 + e - + H +}} = O 2 + OH * (4)

O ₃ + UV = O ^* + O ₂ (5)

O ^* + H ₂ O = 2OH ^* (6)

In the present invention, the plasma generating apparatus can remove contaminants from various active particles (ozone, excited oxygen molecules, nitrogen molecules, water molecules), ions (bond ions such as O, N, C, and H), atoms, OH Not only does it produce radicals, but also plays a role in producing ultraviolet rays having a specific energy required to generate OH radicals, so that no external UV generator is required. In addition, the present invention increases the amount of OH generated by coating the TiO ₂ photocatalyst inside the reactor surrounding the arc electrode and the electrode. If necessary, the photocatalyst is used to increase the contact time between OH radicals and contaminants by using a honeycomb ceramic filter at the outlet of the reactor and a filter surface exposed to the arc. Therefore, when using the principles of the present invention it is thought that the odor, VOCs and bacterial destruction pathways proceed by the following scheme.

1. Ozone Oxidation

(Odors, VOCs and bacteria) + H ₂ O + O ₃ = H ₂ O, CO ₂ , O ₂ , N ₂

2. Plasma high temperature combustion

(Odors, VOCs and bacteria) + Arc + O ₂ = H ₂ O, CO ₂ , O ₂ , N ₂

3.OH ^* radical oxidation

(Odors, VOCs and bacteria) + Arc + OH ^* = H ₂ O, CO ₂ , O ₂ , N ₂

4. Ozone / moisture / ultraviolet oxidation

(Odors, VOCs and bacteria) + H ₂ O + O ₃ = H ₂ O, CO ₂ , O ₂ , N ₂

Ozone decomposes momentarily through the plasma reactor. Under normal experimental conditions, the ozone depletion rate is more than 95%, but the ozone depletion rate can be easily varied between 50-99% by adjusting the amount of ozone generated and the arc power. Untreated traces of residual ozone, NOx and pollutant gases operate at relatively low temperatures (below 50C) and at the same time increase the contact time between radicals and pollutant gases (activated carbon, zeolite, manganese oxide, etc.) Contact with layer 500. At this time, the residual ozone reacts with the residual active oxygen atoms on the surface of the composite activated carbon catalyst layer 500 to return to oxygen, and the residual NOx is oxidized, reacts with moisture, is converted into a trace amount of nitric acid, and adsorbed onto the catalyst surface. On the other hand, residual contaminants are sterilized and deodorized by residual ozone and active oxygen atoms on the surface of the composite activated carbon catalyst layer 500. In addition, active radicals with long life other than ozone (eg NO ₂ ) also remove residual contaminants by oxidation / adsorption on the surface of the composite activated carbon catalyst layer.

The purified gas passing through the composite activated carbon catalyst layer passes through the high-pressure blower 600 and then reacts with the long-lived residual radicals (eg NO ₂ radicals) in the tubular mixer 700 to remove residual contaminants. .

The bi-polar air ionizer 800 that can adjust and generate a certain amount of anions and cations installed at the rear end of the tubular mixer 700 removes untreated bacteria and a small amount of residual odor or the amount of indoor anions and cations. It is used to adjust. The final purified gas exiting the tubular mixer is discharged through an external circulation ventilator 900. At this time, the pollutant level (VOC, ozone) of the emitted gas is measured, and the exhaust gas purified below the environmental regulation value can be circulated to the room and rapidly mixed with the indoor pollutant gas, or released into the atmosphere. At this time, the ozone concentration in the exhaust gas is controlled by the ozone generator capacity and the plasma arc reactor capacity. The ozone concentration in the exhaust gas can be adjusted to be less than 0.01 ppm, which is much lower than 0.05 ppm, which is the domestic indoor ozone concentration standard. If the ozone concentration of 0.01ppm or less is released, the life of activated carbon can be significantly increased by using existing activated carbon.

The configuration and overall operation of the present invention have been described above. Hereinafter, the result of the pollutant gas removal experiment using the apparatus of the present invention will be described.

Experiment 1

An industrial plasma deodorization sterilizer for the treatment of toxic odor gas (styrene steam) and steam generated from two industrial styrene foam extruders installed at the Garak fish market in Seoul was installed. The industrial activated carbon catalyst layer and air ion generator were removed. During the 30 days of continuous operation (200 hours) with 6-8 hours of operation per day, it completely solved the problem of odors caused by the odor from the first day of operation. The amount of processing gas is 18 CMM (cubic meter per minute) and the treated gas is circulated into the factory without being discharged to the outside. The device capacity used was three plasma generators, a 14 g / h ozone generator and a photocatalyst layer coated with a photocatalytic coating on a honeycomb alumina tin. The power consumption used was 880W. The composite activated carbon catalyst layer and the air ion generator were removed because they were treated under the industrial pollution level without the complex activated carbon catalyst layer and the air ion generator.

No residual ozone odor was detected and the concentration was estimated to be less than 0.03 ppm. The gas residence time in the plasma reactor was at least 1 second and the residence time in the entire doctor line was about 3-5 seconds.

Experiment 2

The experiment was carried out to remove the odor containing high moisture generated in the food residue quencher. A side discharge ceramic ozone generator of 3 g / h ozone and an arc plasma generator of about 120 W were used. After 30 minutes of continuous decanter operation, the accumulated high moisture odor gas was blown out by an external blower for 5 minutes and then discharged. The odor gas passed through the water condenser was put into a plasma deodorizer and the deodorizing effect was measured. All three experiments resolved the odor removal. As in Experiment 1, the composite activated carbon catalyst layer and the air ion generator were removed.

Experiment 3

The Korea Institute of Machinery and Materials, a national accredited organization, was commissioned for the deodorization performance test of the commercial product (PERI-AIR20) according to the invention. The product used was equipped with a side discharge ceramic ozone generator of 200 mg / h ozone, an arc plasma generator of approximately 100 W and a general activated carbon filter. Experimental conditions were performed by adding the initial concentration of ammonia (10 ppm), acetaldehyde (10 ppm) and acetic acid (10 ppm) in a confined space of 4 m3, and then operating the product for 30 minutes. Acetaldehyde 50% deodorization removal rate was obtained.

Experiment 4

Without the use of filters only of the ozone 250mg / h in terms of discharge ceramic ozonizer and about 100W plasma deodorizing sterilizers only installed arc plasma generator of the ammonia in a sealed space of _{1.6 m3 (NH 3 50 ppm)} , hydrogen sulfide (H ₂ S 35 ppm), toluene, acetaldehyde deodorization test and bacteria removal test are as follows.

Pusan National University

(1) Ammonia

Time (min) Conc. (ppmv) Time (min) Conc. (Ppmv) 0 80.6 0 70 30 70.2 10 57 85 54.6 30 49 150 44.2 50 33 226 33.8 70 15 326 23.4 80 10 90 7

  ※ Deodorization efficiency: 90% after 90 minutes

(2) Hydrogen sulfide

Time (min) Conc. (ppmv) Time (min) Conc. (Ppmv) 0 28 0 35 10 27 11 31 28 26 22 24 61 21 44 9 95 18 57 2.5 134 15 190 10 213 9 293 6

  ※ Deodorization efficiency: Approx. 93% after 57 minutes

(3) Toluene

Time (min) Conc. (ppmv) Time (min) Conc. (Ppmv) 0 84 0 90 14 81 21 74 57 77 33 62 97 70 44 56 165 62 57 52 210 60 73 48 284 55 94 42

  ※ Deodorization efficiency: 53% after 94 minutes

(4) Acetaldehyde

Time (min) Conc. (ppmv) Time (min) Conc. (Ppmv) 0 50 0 52 50 45 15 48 110 41 33 40 185 34 58 35 220 33 91 34 350 30 115 30 410 29 151 27 181 25

  ※ Deodorization efficiency: Approximately 52% at 181 minutes

Experiment 5

Residual ozone depletion experiments were conducted with the device of the present invention without the use of a normal activated carbon filter. Treatment gas capacity was 0.6-1.1 m3 / min and ozone concentration was measured at the reactor outlet. The ozone meter used was a sensor (GSA-603) that detects when it is above 0.03 ppm and Eco-Sensors, which measures up to 10 ppm (0.01 ppm resolution). The arc power used was 30-150W.

Ozone concentration (ppm)

If no plasma arc occurs If a plasma arc occurs

0.4 0.01

0.38 0.01

1 <0.03

1.47 <0.03

2 <0.03

2.8 <0.03

Experiment 6

The qualitative test method (smell) for about 8 months in the field shows the results of various odor deodorization experiments as follows.

-Tobacco smoke: Complete removal in 5-60 minutes with a treatment capacity of 0.8m3 / min in a smoking space of 5,10,20,40 pyeong

Sesame Oil Smoke: Removes the pungent smell of smoke within 1 second after adding spicy smoke generated at a temperature of about 250 degrees or more to squeeze sesame or perilla.

-Spicy odor when pepper and garlic are ground: Removes the odor of smoke within 1 second after entering the unit.

-Various odors generated when cooking foods (Miso, fish, meat): 10, 30, 70 pyeong Almost completely eliminates the odor generated in the apartment kitchen within 30 minutes.

-Odor accumulated in the 40 pyeong office in the fish by-product treatment plant: Completely solved the odor after 48 hours of continuous operation

-Remove smell from PC room, game room, room salon

As described above, according to the plasma deodorizing sterilizer according to the present invention, the following effects are obtained.

1) Air containing various pollutant (organic, inorganic) gases is deodorized and sterilized by active species including electrons, ions, active atoms, molecules, ultraviolet rays, and OH radicals generated by arc plasma. To harmless fresh air.

2) Ozone has low reactivity at room temperature, but it converts into active oxygen and OH radicals that are highly oxidizing in an arc plasma reactor coated with a photocatalyst, which produces high efficiency deodorization and sterilization effect.

3) It is economically advantageous in miniaturization of equipment and energy saving because it is achieved only by low temperature catalytic chemical reaction with active particles formed in ozone and plasma without using mechanical filter for deodorizing sterilization.

4) It is not necessary to use a separate UV generating lamp as a means of generating OH radicals.

5) Plasma generator is simple in structure, easy to operate and operated, and at the same time, it is very inexpensive to maintain due to little electrode consumption.

6) Since residual ozone can be instantaneously destroyed in an arc plasma reactor, even if the pretreatment ozone treatment concentration is increased to the maximum, the residual ozone concentration can be easily controlled to be well below the safety limit.

7) Trace amounts of residual ozone and nitrogen oxides (NOx) from the arc plasma reactor pass through the combined activated carbon catalytic filter to remove residual contaminants, convert ozone into oxygen, and use purified gas to circulate and use the energy. Saving and air pollution can be done at the same time.

Although the present invention illustrates only one embodiment, it is merely an example and there may be various improvements according to the present invention. For example

Depending on the degree of deodorization removal rate, the composite activated carbon catalyst layer and the ion generator may be added or omitted. Instead of installing the blower after the mixer, the blower can be installed after the tubular mixer. The high speed, low flow air flowing between the sliding arc electrodes instead of the blower may use a small compressor, and the air flowing around the arc may use a low speed high flow fan. The photocatalyst coating method inside the reactor may also coat glass or ceramic surfaces depending on the arc power and arc temperature used. In addition, a filter for catching dust may be installed on the urea element, and a carbon filter or a sterilizing or antibacterial filter may be attached to the outlet of the device of the present invention in order to remove more traces of ozone or harmful microorganisms in the final exhaust gas. In addition, it can be used as an instant ozone depleting apparatus only by the plasma generating apparatus. Ozone and various odor, dust and VOC detection sensors can be installed in the urea, ozone generators, safety sensors to detect malfunctions of arc plasma generators, and systems to automate ozone / arc power / water levels. Various improvements can be made such as ozone generator capacity, ozone generator power capacity, arc plasma generator shape, material and capacity, its power capacity, photocatalyst coating method, etc., suitable for the amount of gas to be treated.

1 is a plasma deodorization process chart according to the present invention

2 is an overall operation process diagram of the plasma deodorizer sterilizer according to the present invention,

3 is a process chart showing a key component of the plasma deodorizer sterilizer according to the present invention,

4 is a cross-sectional view of an arc plasma generator and a reactor according to the present invention.

Claims (15)

Ozone generator; A gas mixer which increases the contact time and the contact area of the polluting gas and ozone; humidifier; A sliding arc generator and a reactor apparatus in which at least two arc electrode surfaces and the inside of the reactor are coated with a photocatalyst; Honeycomb Photocatalyst Filter Coated with Photocatalyst A composite activated carbon catalyst filter capable of treating residual ozone, NOx and residual pollutant gases; Low noise high wind pressure gas blower or low flow compressor; Pipe type mixer to increase the residence time of residual radicals and at the same time reduce the sound generated by the arc plasma generator and blower; And Plasma deodorization sterilization apparatus and system for removing contaminant gas including odor, microorganisms and bacteria including air ion generator Uniformly mixing high concentrations of ozone and contaminated air; Generating various active atoms, molecules, electrons, ions, radicals by a sliding arc plasma generator; Generating OH radicals and plasma oxide ions having stronger oxidizing power than ozone by ultraviolet rays, photocatalysts, residual ozone and moisture generated in the sliding arc plasma; Combustion reaction by heat of the arc plasma; Treating a small amount of residual ozone, residual pollutant gas, residual nitride oxide, etc. with the composite activated carbon catalyst filter; Maintaining a process gas flow rate necessary for stabilizing arc plasma with a blower having a suitable wind pressure; Contacting the long-lived radical with the residual oil pollutant gas with a long cross-sectional pipe mixer having a long cross section and reducing the sound generated by arc plasma generation; Plasma deodorization sterilization method comprising the steps of stably generating appropriate anions and cations with air ion generator The method of claim 1, An ozone generator with an ozone generation rate of 3.5 g / h or less is a ceramic generator using air based on the principle of DBD surface discharge that can directly contact polluted gases. If ozone generation amount is more than 3.5g / h, ozone generator using separate corona DBD with oxygen generator. The ozone concentration in the process gas is 1-100 ppm. The method of claim 1, A low noise, high wind blower or low flow compressor capable of supplying air having a constant pressure and flow rate between the arc electrodes to obtain the required arc plasma power and to cool the arc electrodes to increase arc electrode life. The flow rate of the processing gas passing between the arc electrodes is 1-50 m / s. The method of claim 1, Humidifier that supplies water to the plasma reactor by atomizing water using heat steam, compressed air or ultrasonic waves   The method of claim 1, It is possible to adjust the treated outlet temperature to less than 50 degrees by the sliding arc plasma apparatus and gas flow rate adjustment, which impose high frequency, high voltage and low current between two photo-coated, electrode-shaped electrodes with high arc voltage. Plasma Deodorization Sterilizer with Automatic System   The method according to claim 1 and 6, AC power supplies with a power supply specification of 60 30,000 Hz, 3,000-20,000 Volt, 5-200 mA for generating arc plasma The method of claim 1, Plasma deodorizer sterilizer with sliding arc plasma generator and reactor apparatus that generates OH and other powerful oxidative radicals using ozone, combustion, ultraviolet light and photocatalyst The method of claim 2, Sliding arc plasma generator and reactor to destroy residual ozone almost instantaneously 50-99%  The method according to claim 1 and 9, Plasma deodorization sterilizer with sliding arc plasma generator, reactor and composite activated carbon catalyst filter which can reduce ozone residual amount in exhaust gas to 0.03ppm or less which is less than indoor environmental safety standard The method of claim 1, Plasma deodorization sterilizer with a composite activated carbon catalytic filter made of activated carbon, zeolite, manganese dioxide, nickel oxide, platinum oxide, silica / alumina ceramics to handle residual ozone, residual nitrogen oxides and residual pollutant gases  The method of claim 1, Plasma deodorization sterilizer having a honeycomb photocatalyst filter made of ceramic, metal, glass fiber and fiber.  The method of claim 1, Plasma deodorizer sterilizer with air ion generator that can generate 50,000-500,000 / cc negative ions to remove low odor, microorganism and bacteria The method of claim 1, Plasma deodorizing sterilizer having a sliding arc electrode and a sliding arc plasma generator and a reactor apparatus in which the inner wall of the reactor is coated with a liquid or solid TiO ₂ photocatalyst  The method of claim 1, Plasma deodorization sterilization apparatus and method capable of treating 1000 cubic meters of pollutant gas per minute by connecting a sliding arc plasma apparatus in a series or parallel or a combination of series / parallel.